What is advantages/ disadvantages of selecting one of these standards other than sealing mechanism. In other words, can API 685 provide similar operating range as API 610? Is it feasible?
How about reliability and long term operation? which one is more reliable and less maintenance required...
any suggestion on straight run after discharge flange? how can this affect pump performance?
There is a elbow bolting on the discharge flange?
discharge nozzle size is 6".
Thank you all for the responses, so I believe we can manage flow rate and head by throttling discharge valve an achieve to the different flow rate/ head as per pump's curve.
Thank you all for your responses, this pump is currently under operation and we have lots of issue and maintenance works. I suspect high NSS can cause all of this issue.
Hello,
The suction specific speed of centrifugal pump with 3560 rpm constant speed, with below operating condition is app. 12370 which is high. what would be the effect of this and what is your recommendation to decrease it?
1000 gpm, npshr: 19ft, 3560 rpm, 150hp, Sp.Gr. 0.8
Hello,
There is centrifugal pump with constant speed (no VFD), as per pump curve it can provide different flow rate which will cause to have different DH.
How would it be possible to have higher/ lower flow rate from the pump without changing the impeller size, motor speed, and no change in...
Thank you all for the responses,
@EdStainless
I am in the same page with you, this would be highly unlikely to happened.
@LittleInch
This is API 685 sealless pump, there is a slight change to the feed liquid characteristics due to some process change in the upstream which cause suction screen...
Greetings everyone,
I appreciate your advise on below question:
Can cavitation on sealless pump/ canned pump cause any leakage to the environment?
The pumping liquid has high h2s and we are looking for possible risk of leakage in case of pump failure- cavitation.
Thanks in advance for your...
@Georgeverghese
Can you please explain more?
To calculate centrifugal compressor power, we need these gas properties: compressibility factor (Z), molecular weight (MW), inlet gas temperature, inlet gas pressure, outlet gas pressure, adiabatic component (Cp/Cv), and mass flow rate. so change in...
Thanks for all the responses.
It is haydraulic actuator and yes I mean higher viscosity.
I am thinking about another possibiility which is having new process gas characterstics with higher molcular weight then we need more power/ steam.
Hello,
In our centrifugal compressor- turbine driven the governor position becoming more and more open and intermittently spiking to fully saturated recently.
The governor has been saturating quite frequently but the control also appears erratic.
In addition as I understood recently we are...
Hi All,
What shall be the basis for selection between normal control valve and auto recirculation valve in the pump minimum flow line?
What are the basic requirements and considerations?
